Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
dan cau » danh cau, dan ca, van cau
thuc va » thuc vat, thuc dan, thuc day
vu nham » vu kham, vu cham, sua nham
sach ky » sac ky, sach y, sach kem
hieu vu » hieu va, hieu ve, hieu su
sang ma » tang ma, nang ma, sang tao
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach ty)) sang ma hoi. hieu vu nham thuc va ((dan cau) OR (dat cau)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) sang ma hoi. hieu vu nham thuc va ((dan cau) OR (dat cau)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach ty)) sang ma hoi. hieu vu nham thuc va ((dan cau) OR (dat cau)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) sang ma hoi. hieu vu nham thuc va ((dan cau) OR (dat cau)) cua tre*.